Question

我刚刚将我的一个ASP.NET核心项目更新到1.1版本，因为我收到了以下错误（在第一次调用时工作正常，但在以下情况下失败）

无法访问已处置的对象。

在以下一行：

    private ILogger logger;
    public ValuesController(ILoggerFactory loggingFactory)
    {
        logger = loggingFactory.CreateLogger<ValuesController>();
    }

该项目使用DryIoc作为容器，我的启动看起来像这样：

    using System;
using DryIoc;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using DryIoc.Microsoft.DependencyInjection;

namespace WebApplication2
{
    public class CompositionRoot
    {
        public CompositionRoot(IRegistrator r){}
    }

    public class Startup
    {
        public Startup(IHostingEnvironment env)
        {
            var builder = new ConfigurationBuilder()
                .SetBasePath(env.ContentRootPath)
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
                .AddEnvironmentVariables();
            Configuration = builder.Build();
        }

        public IConfigurationRoot Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public IServiceProvider ConfigureServices(IServiceCollection services)
        {
            // Add framework services.
            services.AddMvc().AddControllersAsServices();
            return new Container()
            // setup DI adapter
            .WithDependencyInjectionAdapter(services,
                // optional: propagate exception if specified types are not resolved, and prevent fallback to default Asp resolution
                throwIfUnresolved: type => type.Name.EndsWith("Controller"))
            // add registrations from CompositionRoot classs
            .ConfigureServiceProvider<CompositionRoot>();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();

            app.UseMvc();
        }
    }
}

我的project.json看起来像这样：

  {
"dependencies": {
  "Microsoft.AspNetCore.Server.Kestrel": "1.1.0",
  "Microsoft.Extensions.Logging": "1.1.0",
  "Microsoft.Extensions.Configuration.Json": "1.1.0",
  "Microsoft.Extensions.Configuration.FileExtensions": "1.1.0",
  "Microsoft.AspNetCore.Mvc": "1.1.0",
  "Microsoft.AspNetCore.Routing": "1.1.0",
  "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0",
  "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.1.0-preview4-final",
  "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0",
  "Microsoft.Extensions.Logging.Console": "1.1.0",
  "Microsoft.Extensions.Logging.Debug": "1.1.0",
  "Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.0",
  "DryIoc.Microsoft.DependencyInjection": "1.0.2"
},
  "tools": {
  },
  "frameworks": {
      "netcoreapp1.1": {
          "dependencies": {
              "Microsoft.NETCore.App": {
                  "type": "platform",
                  "version": "1.1.0"
              }
          }
      }
  },
  "buildOptions": {
      "emitEntryPoint": true
  },
  "runtimeOptions": {
      "configProperties": {
          "System.GC.Server": true
      }
  },
  "scripts": {
      "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }

}

非常感谢任何帮助

Answer 1

用

替换CompositionRoot

    public class CompositionRoot
    {
        public CompositionRoot(IRegistrator r)
        {
            r.Unregister<ILoggerFactory>();
            r.Register<ILoggerFactory, LoggerFactory>(Reuse.Singleton);
        }
    }

P.S。找到了您的机票https://bitbucket.org/dadhi/dryioc/issues/432/loggingfactory-disposed-on-second-call。

Answer 2

问题已在v1.1.1修复。

问题是由于外部实例注册为瞬态。一次性实例由容器跟踪，但将与第一个范围（请求）一起处理，因此将在第二个范围（请求）中抛出异常。现在它被注册为单身人士。

顺便说一下。要在DryIoc容器中找出问题或自定义框架注册，您可以将registerDescriptor代表提供给WithDependencyInjectionAdapter方法。 DryIoc repo中的示例使用example usage

进行更新

LoggingFactory在第二次通话

2 个答案: